Quantum control and characterisation

The advancement of quantum computing relies on our ability to precisely control and accurately characterise quantum systems. This demands innovative techniques for manipulating quantum states, as well as methods for measuring and verifying the performance of quantum devices. The Quantum Control and Characterisation group at QSI is dedicated to addressing these challenges by developing novel methods for quantum control, measurement, and verification, ensuring the future success of quantum computing technologies.

Key members: A/Prof Christopher Ferrie, Dr Christina Giarmatzi.

Quantum control techniques

The ability to accurately control quantum systems is crucial for the implementation of quantum algorithms and error correction protocols. Our research focuses on developing advanced quantum control techniques that allow for the precise manipulation of quantum states and operations. This includes adaptive feedback control, optimal control, and robust control methods, tailored to the unique requirements of quantum computing systems. We focus on the use of artificial intelligence-based techniques to achieve these goals.

Quantum measurement and characterisation

Understanding and quantifying the performance of quantum devices is essential for their development and improvement. We work on innovative quantum measurement and characterisation methods, including quantum state and process tomography, compressed sensing, and quantum machine learning approaches. Our goal is to devise efficient techniques that provide accurate characterisations of quantum systems while accounting for experimental imperfections and limitations.

Quantum device verification

As quantum devices become increasingly complex, ensuring their reliability and performance poses a significant challenge. Our research addresses this issue by developing rigorous verification methods for quantum devices, ranging from quantum gate and circuit testing to benchmarking and validation of quantum processors. These methods are designed to provide confidence in the performance of quantum devices and identify areas for improvement.

Noise and error analysis in quantum systems

Quantum systems are inherently susceptible to noise and errors, which can severely impact the performance of quantum devices. We investigate the sources and effects of noise in quantum systems and develop methods for noise mitigation and error correction. Our research also aims to understand the fundamental limits of noise tolerance in quantum computing and explore strategies for achieving fault-tolerant quantum computation.